HEPData Search

Double differential cross sections for the photon induced emission of π − , π + and protons from Be, C, O, Ti, and Pb have been measured in the photon energy range k = 220–450 MeV using the tagged photon beam of the Bonn 500 MeV synchrotron. The hadron detector consists of a magnetic spectrometer and a large acceptance scintillation counter array. For Be, the single-arm energy distributions show clear structures from quasi-free pion production and quasi-deuteron photodisintegration. These structures disappear with increasing target size. The dependence of the differential cross section on the nuclear size S at Θ lab = 52° can be described by the power law d σ/ d Ω ∞ S α , where S is the number of protons or neutrons, respectively. The exponent is α π ≈ 0.6 for π − and π + and α p ≈ 1.15 for protons. Data for pn, pp, and pπ coincidences are presented. The results are compared to intranuclear cascade codes (PICA and PIKI) and to microscopic calculations.

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

Polarization of cumulative protons in the reaction gamma A --> p X.

Avakyan, R.O. ; Avakian, E.O. ; Avdalyan, G.A. ; et al.

Sov.J.Nucl.Phys. 51 (1990) 999-1000, 1990.

Inspire Record 306076 DOI 10.17182/hepdata.17310

None

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

Polarization of cumulative protons in the reaction gamma A --> p X.

Avakian, R.O. ; Avetisian, A.E. ; Arestakesian, G.A. ; et al.

Sov.J.Nucl.Phys. 49 (1989) 292-294, 1989.

Inspire Record 284675 DOI 10.17182/hepdata.17336

None

2 data tables

Table 1

No description provided.

Table 2

No description provided.

MEASUREMENT OF THE POLARIZATION OF CUMULATIVE PROTONS IN gamma A ---> p X REACTION

Avakian, R.O. ; Avakian, E.O. ; Avetisian, A.E. ; et al.

Yad.Fiz. 42 (1985) 667-670, 1985.

Inspire Record 210380 DOI 10.17182/hepdata.17606

None

1 data table

Table 1

Axis error includes +- 7/7 contribution.

The ($\gamma$, $p$) Reaction on Light Nuclei in the $\Delta(1232)$ Resonance Region

Homma, S. ; Kanazawa, M. ; Koike, M. ; et al.

Phys.Rev.Lett. 53 (1984) 2536, 1984.

Inspire Record 203334 DOI 10.17182/hepdata.20403

Momentum spectra of protons from the (γ, p) reaction have been measured at θp=30° for H1, H2, He4, Be9, C12, and O16 with a tagged photon beam with energies from 187 to 427 MeV. By analysis of these inclusive proton spectra, cross sections for the pion photoproduction from the quasifree nucleon in the target nucleus and those for the photodisintegration of the quasifree two-nucleon system have been obtained as a function of the photon energy and of the target mass number.

1 data table

Table 1

NUMERICAL VALUES SUPPLIED BY S. HOMMA.